Cooling System

Abstract

A cooling system using brine includes: a refrigerant circuit that has a compressor, a condenser, and an expansion valve; a brine circuit that has a cooler and a pump for circulating the brine; a first heat exchanger that is shared by the refrigerant circuit and the brine circuit and performs heat exchange between a refrigerant flowing on a downstream side of the expansion valve of the refrigerant circuit and the brine flowing on a downstream side of the cooler of the brine circuit; and a second heat exchanger that is provided between the cooler and the first heat exchanger and performs heat exchange between the brine and the outdoor air.

1 . A cooling system comprising: 
 a refrigerant circuit that has a compressor, a condenser, and an expansion valve;    a brine circuit that has a cooler and a pump for circulating brine;    a first heat exchanger that is shared by the refrigerant circuit and the brine circuit and performs heat exchange between a refrigerant flowing on a downstream side of the expansion valve of the refrigerant circuit and the brine flowing on a downstream side of the cooler of the brine circuit; and    a second heat exchanger that is provided between the cooler and the first heat exchanger and performs heat exchange between the brine and outdoor air.    
   
   
       2 . The cooling system according to  claim 1 , further comprising: 
 a blower for forcibly bringing the outdoor air into contact with the second heat exchanger.    
   
   
       3 . The cooling system according to  claim 1 , wherein: 
 at least the second heat exchanger out of the refrigerant circuit and the second heat exchanger is provided outside a room.    
   
   
       4 . The cooling system according to  claim 1 , wherein: 
 the brine circuit includes a by-pass path provided in parallel to the second heat exchanger and switching means for switching a circulation path of the brine to at least one of the second heat exchanger and the by-pass path.    
   
   
       5 . The cooling system according to  claim 1 , further comprising: 
 a first controlling means for controlling a capacity of the compressor of the refrigerant circuit to fall when outdoor temperature is lower than a predetermined temperature.    
   
   
       6 . The cooling system according to  claim 1 , further comprising: 
 a second controlling means for controlling an amount of circulation by the pump to fall when outdoor temperature is lower than a predetermined temperature.    
   
   
       7 . The cooling system according to  claim 2 , further comprising: 
 a third controlling means for controlling an air quantity of the blower to fall when outdoor temperature is lower than a predetermined temperature.    
   
   
       8 . The cooling system according to  claim 4 , further comprising: 
 a first controlling means for controlling a capacity of the compressor of the refrigerant circuit to fall when outdoor temperature is lower than a predetermined temperature.    
   
   
       9 . The cooling system according to  claim 4 , further comprising: 
 a second controlling means for controlling an amount of circulation by the pump to fall when outdoor temperature is lower than a predetermined temperature.    
   
   
       10 . The cooling system according to  claim 4 , further comprising: 
 a blower for forcibly bringing the outdoor air into contact with the second heat exchanger.    
   
   
       11 . The cooling system according to  claim 5 , further comprising: 
 a second controlling means for controlling an amount of circulation by the pump to fall when the outdoor temperature is lower than the predetermined temperature.    
   
   
       12 . The cooling system according to  claim 5 , further comprising: 
 a blower for forcibly bringing the outdoor air into contact with the second heat exchanger.    
   
   
       13 . The cooling system according to  claim 6 , further comprising: 
 a blower for forcibly bringing the outdoor air into contact with the second heat exchanger.    
   
   
       14 . The cooling system according to  claim 10 , further comprising: 
 a third controlling means for controlling an air quantity of the blower to fall when outdoor temperature is lower than a predetermined temperature    
   
   
       15 . The cooling system according to  claim 12 , further comprising: 
 a third controlling means for controlling an air quantity of the blower to fall when the outdoor temperature is lower than the predetermined temperature.    
   
   
       16 . The cooling system according to  claim 13 , further comprising: 
 a third controlling means for controlling an air quantity of the blower to fall when the outdoor temperature is lower than the predetermined temperature.